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The Benefits to Taxpayers from Increases in Students - RAND ...

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<strong>The</strong> Costs of Provid<strong>in</strong>g Additional Education 71<br />

over six years. <strong>The</strong> discounted present value of the cost of this <strong>in</strong>crease <strong>in</strong> education<br />

would be about $47,000 <strong>in</strong> 2002 dollars.<br />

Research has shown that the average cost of education per student falls as the<br />

number of students <strong>in</strong> a school or district rises. To the extent that educational atta<strong>in</strong>ment<br />

is <strong>in</strong>creased by add<strong>in</strong>g students <strong>to</strong> the exist<strong>in</strong>g educational <strong>in</strong>frastructure, the cost<br />

of education we use is an overestimate of the costs taxpayers would <strong>in</strong>cur <strong>to</strong> <strong>in</strong>crease<br />

education. For policy goals that would result <strong>in</strong> a large <strong>in</strong>crease <strong>in</strong> enrollment, capacity<br />

may need <strong>to</strong> be expanded through new <strong>in</strong>vestments. In this case, the use of current<br />

average cost will certa<strong>in</strong>ly be more appropriate than current marg<strong>in</strong>al cost. Across both<br />

cases, our practice of us<strong>in</strong>g average rather than marg<strong>in</strong>al costs <strong>in</strong> our estimates implies<br />

that our net benefit calculations are lower bounds.

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